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PatchSiren cyber security CVE debrief

CVE-2026-112856 ThemeREX Group CVE debrief

A critical vulnerability was found in the WordPress Vagabonds theme, versions up to and including 1.3.10. This issue allows for PHP Object Injection due to deserialization of untrusted data. The vulnerability has a CVSS score of 9.8, indicating a high severity level. Defenders should assess exposure and prioritize remediation efforts. The vulnerability could lead to potential code execution or data tampering, emphasizing the need for version verification and patch application to prevent impact on website integrity and user data.

Vendor
ThemeREX Group
Product
Vagabonds
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-23
Original CVE updated
2026-10-24
Advisory published
2026-10-23
Advisory updated
2026-10-24

Who should care

Defenders responsible for WordPress installations using the Vagabonds theme should assess exposure and prioritize remediation efforts. This includes administrators, security teams, and IT personnel managing WordPress environments. They should verify version information, apply vendor-provided patches or updates, and review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-112856 is a critical vulnerability in the WordPress Vagabonds theme that allows for PHP Object Injection. Defenders should assess exposure, prioritize remediation, and verify versions to prevent potential code execution or data tampering.

  • Potential for code execution or data tampering
  • Need for version verification and patch application
  • Possible impact on website integrity and user data

Technical summary

The WordPress Vagabonds theme, versions up to and including 1.3.10, is vulnerable to PHP Object Injection due to deserialization of untrusted data. This issue has a CVSS score of 9.8, indicating a high severity level. The vulnerability arises from the theme's insecure handling of serialized data, which could allow attackers to inject malicious objects. Defenders should focus on updating to a patched version to mitigate potential risks.

Defensive priority

High

Recommended defensive actions

  • Assess exposure of WordPress installations using the Vagabonds theme, versions up to and including 1.3.10
  • Prioritize remediation efforts for affected installations
  • Verify version information and apply vendor-provided patches or updates

Evidence notes

The CVE record and source item provide details on the vulnerability, including its CVSS score and affected versions. However, additional information on exploitation or impact is limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-112856 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-112856

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-112856 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-112856

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.